What does the size of a pixel depend on in radiography?

In radiography, the size of a pixel is determined by both the field of view (FOV) and the matrix size. The matrix size refers to the number of pixels used to create the image. A larger matrix size means there are more pixels available to represent the same FOV, which results in smaller individual pixel sizes. Conversely, if the field of view is held constant and the matrix size is reduced, the pixel size will increase. Thus, the relationship between the FOV and matrix size directly influences pixel size, indicating that these two factors are crucial for understanding pixel dimensions in radiographic images.

Other options like the detector type and imaging technique can influence the quality and resolution of the images produced but do not directly determine pixel size in the way that the combination of FOV and matrix size does.